For group video calling everyone on the call needs Skype 5.0 for Windows or Mac or higher plus webcams. For best quality we recommend you use a high-speed broadband connection of 4Mbps down/512kbps up and a computer with a Core 2 Duo 1.8 GHz processor. As a minimum you’ll need a high-speed broad connection of 512kbps down/128kbps up and a computer with a 1 GHz processor.